DE545452C - Device for alternately switching on several sound reproduction devices arranged in a distributed manner behind the projection screen - Google Patents
Device for alternately switching on several sound reproduction devices arranged in a distributed manner behind the projection screenInfo
- Publication number
- DE545452C DE545452C DEK114257D DEK0114257D DE545452C DE 545452 C DE545452 C DE 545452C DE K114257 D DEK114257 D DE K114257D DE K0114257 D DEK0114257 D DE K0114257D DE 545452 C DE545452 C DE 545452C
- Authority
- DE
- Germany
- Prior art keywords
- cylinder
- sound
- line
- control
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
AUSGEGEBEN AM
29. FEBRUAR 1932ISSUED ON
FEBRUARY 29, 1932
REICHSPATENTAMTREICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
Vr 545452 KLASSE 42 g GRUPPE VR 545452 CLASS 42 g GROUP
Robert Koller in Baden, SchweizRobert Koller in Baden, Switzerland
Patentiert im Deutschen Reiche vom 10. April 1929 abPatented in the German Empire on April 10, 1929
Die Erfindung bezieht sich auf eine Einrichtung zum wechselweisen Einschalten mehrerer hinter der Projektionswand verteilt angeordneter Tonwiedergabevorrichtungen (Lautsprecher) bei der Vorführung von Tonfilmen. Es ist bekannt, das wechselweise Einschalten der Tonwiedergabevorrichtungen mittels eines gelochten Steuerbandes herbeizuführen, dessen in verschiedenen Zonen an-The invention relates to a device for alternating switching on several sound reproduction devices arranged in a distributed manner behind the projection screen (Loudspeaker) when showing sound films. It is known to do this alternately To switch on the sound reproduction devices by means of a perforated control tape, of which in different zones
to geordnete Lochungen oder Lochreihen der
Dauer der Tonwiedergabe der einzelnen Tonquellen entsprechende Längen aufweisen. Mit
den einzelnen Zonen dieses Steuerbandes wirkt bei den bekannten Ausführungen je ein den Stromschließer der entsprechenden
Tonwiedergabevorrichtung beeinflussender federbelasteter Fühlerhebel o. dgl. derart zusammen,
daß beim Vorbeigang einer Lochung oder einer Lochreihe eine Bewegung dieses Fühlerhebels stattfindet, wodurch der zugehörige
Stromschließer in Tätigkeit gesetzt wird. Die mechanische Einschaltvorrichtung hat den Nachteil, daß sie infolge der Trägheit
der mechanisch bewegten Teile nicht mit der erforderlichen Genauigkeit anspricht und
daß außerdem sehr leicht Beschädigungen des gelochten Steuerbandes eintreten, beispielsweise
die Lochungen ausreißen können.
Man hat daher bereits vorgeschlagen, bei Verwendung derartiger Kontaktsteuerbänder
pneumatische Stromschluß vorrichtungen zu verwenden, und zwar in Anwendung auf
Plattentonfilmgeräte, bei denen die Stromschlußvorrichtung zum Betätigen einer die
Sprechmaschine an das Antriebswerk ankuppelnden elektromagnetischen Kupplung dient.
Die pneumatische Stromschlußvorrichtung wird hierbei durch Lochungen des Filmbandes,
welches den Abschluß für eine Luftleitung bildet, in Tätigkeit gesetzt. Je zwei aufeinanderfolgende
Lochungen des Filmbandes begrenzen eine Sprechperiode, indem eine Lochung das Schließen und die andere das
Öffnen der elektromagnetischen Kupplung herbeiführt.to have ordered holes or rows of holes corresponding to the duration of the sound reproduction of the individual sound sources. In the known designs, a spring-loaded sensor lever or the like, which influences the circuit breaker of the corresponding sound reproduction device, interacts with the individual zones of this control band in such a way that this sensor lever moves when a hole or a row of holes is passed, whereby the associated circuit breaker is activated . The mechanical closing device has the disadvantage that it does not respond with the required accuracy due to the inertia of the mechanically moving parts and that damage to the perforated control band can also occur very easily, for example the perforations can be torn out.
It has therefore already been proposed to use pneumatic power circuit devices when using such contact control bands, namely in application to record film devices in which the power circuit device is used to operate an electromagnetic coupling coupling the speaking machine to the drive mechanism. The pneumatic current connection device is set into action through perforations in the film strip, which forms the termination for an air line. Two consecutive perforations of the film tape limit a speaking period in that one perforation causes the electromagnetic coupling to close and the other to open.
Die Erfindung betrifft die zweckmäßige Ausbildung derartiger pneumatischer Stromschlußvorrichtungen in Anwendung auf die eingangs bezeichneten bekannten Einrichtungen zum wechselweisen Einschalten mehrerer hinter der Projektionswand verteilt angeordneter Tonwiedergabevorrichtungen. Nach der Erfindung münden die Luftleitungen in Durchbrechungen eines Zylinders oder Zylinderabschnittes, um den das Steuerband unter Spannung herumgeführt ist, wodurch die Sicherheit des Abschlusses der Leitungsmündungen wesentlich erhöht wird. Die pneumatischen Stromschalter, beispielsweise Zylinder mit darin verschiebbar gelagerten Kolben oder Ventilkörpern, sind nach der Erfindung in den Luftleitungen zwischen deren durch das Steuerband abgeschlossenen Mündungen und der gemeinsamen Luftpumpe o. dgl. eingeschaltet. Bei der bekannten pneumatischen StromschlußvorrichtungThe invention relates to the appropriate design of such pneumatic current connection devices in application to the known devices mentioned at the beginning for alternately switching on several Sound reproduction devices arranged distributed behind the projection screen. According to the invention, the air lines open in openings in a cylinder or cylinder section around which the control band is led around under tension, whereby the security of the termination of the line mouths is increased significantly. The pneumatic power switches, for example cylinders with slidably mounted therein Pistons or valve bodies are according to the invention in the air lines between their mouths closed by the control belt and the common air pump or the like switched on. In the known pneumatic circuit breaker
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK114257D DE545452C (en) | 1929-04-10 | 1929-04-10 | Device for alternately switching on several sound reproduction devices arranged in a distributed manner behind the projection screen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK114257D DE545452C (en) | 1929-04-10 | 1929-04-10 | Device for alternately switching on several sound reproduction devices arranged in a distributed manner behind the projection screen |
Publications (1)
Publication Number | Publication Date |
---|---|
DE545452C true DE545452C (en) | 1932-02-29 |
Family
ID=7242973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK114257D Expired DE545452C (en) | 1929-04-10 | 1929-04-10 | Device for alternately switching on several sound reproduction devices arranged in a distributed manner behind the projection screen |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE545452C (en) |
-
1929
- 1929-04-10 DE DEK114257D patent/DE545452C/en not_active Expired
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